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is a significant concern for physicians. Central" R& I8 }" g! B: t3 @+ G
precocious puberty (CPP), which is mediated' [; } T8 U ?
through the hypothalamic pituitary gonadal axis, has/ O6 c2 W6 ~8 Z2 \& O$ s1 N! i, m
a higher incidence of organic central nervous system
( S, F1 M. G, @lesions in boys.1,2 Virilization in boys, as manifested+ o3 [& _) h$ @- y1 }8 n; A
by enlargement of the penis, development of pubic
' Y4 v; B/ B& n1 y' C/ @1 Qhair, and facial acne without enlargement of testi-: `- a1 n( L/ G: s+ F
cles, suggests peripheral or pseudopuberty.1-3 We
2 u& q$ u3 S3 C) Z v' wreport a 16-month-old boy who presented with the1 ?/ [8 _! f% ], [
enlargement of the phallus and pubic hair develop-
- }6 R. W" |1 @. s* Vment without testicular enlargement, which was due3 O4 J" p: i8 p/ |6 D* j: X {% O
to the unintentional exposure to androgen gel used by
$ I+ @) G2 U' n$ nthe father. The family initially concealed this infor-
& R* b G5 t4 { E6 T% y; c Cmation, resulting in an extensive work-up for this
7 x3 s( e) b# s. tchild. Given the widespread and easy availability of
7 P; r# f+ M1 R: Xtestosterone gel and cream, we believe this is proba- d) H+ @% ?) q
bly more common than the rare case report in the
1 U0 |; |9 _8 N& S* Y" V1 Mliterature.4 V; p' G) w5 z' h5 l
Patient Report' H. b. t# @5 M: \
A 16-month-old white child was referred to the/ N" r8 I# o6 L% Y! d9 k
endocrine clinic by his pediatrician with the concern W C7 W C! K" H1 @% Q( @
of early sexual development. His mother noticed' F# W; N3 J* h4 _# V4 I" D
light colored pubic hair development when he was4 z, j6 l% c4 o( G! M9 ^3 e
From the 1Division of Pediatric Endocrinology, 2University of
% L* p. v: l& Z; q4 \( ?% p4 L9 fSouth Alabama Medical Center, Mobile, Alabama.; K" a! e" {$ ~! h0 r1 I5 _
Address correspondence to: Samar K. Bhowmick, MD, FACE,
6 r P" |1 H4 }, v& [" UProfessor of Pediatrics, University of South Alabama, College of
( b0 [! @" Q. r! {' bMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
% U( g9 F( L$ s/ N4 L' Ae-mail: [email protected].
- c- S% q, V2 d8 O% Cabout 6 to 7 months old, which progressively became/ {+ ?4 E7 x9 Y
darker. She was also concerned about the enlarge-! n g3 o5 q$ n6 D, d7 q
ment of his penis and frequent erections. The child
7 {0 g% o6 U2 Q- jwas the product of a full-term normal delivery, with
" M& V# V# I" va birth weight of 7 lb 14 oz, and birth length of
! |5 n" f8 x+ a5 ?20 inches. He was breast-fed throughout the first year
( S* ?3 \! y6 P8 p' xof life and was still receiving breast milk along with5 R" F- v1 l* N% O0 Z& u9 g) R
solid food. He had no hospitalizations or surgery,
! ?6 {2 @2 ^) A8 e: t/ P2 w, U0 Nand his psychosocial and psychomotor development5 t& D% A: p- D( Y2 @4 }
was age appropriate.- i4 H$ S$ K" l: c8 S! {0 K. |5 y
The family history was remarkable for the father,
; |9 W3 L, L% E1 c2 swho was diagnosed with hypothyroidism at age 16,
% M9 S% _/ S. q1 @6 _' @which was treated with thyroxine. The father’s+ G3 K& |! A! `4 N- ?
height was 6 feet, and he went through a somewhat
' [+ {4 U1 [- ?# H9 q- Qearly puberty and had stopped growing by age 14.
+ W; Q4 ]& _9 a) ]The father denied taking any other medication. The' \ D+ t8 t+ k& U6 t
child’s mother was in good health. Her menarche
0 G' e6 s D" @was at 11 years of age, and her height was at 5 feet
4 U7 L4 q6 F" G$ s5 inches. There was no other family history of pre-
A; d7 S" v) O/ K9 Ycocious sexual development in the first-degree rela-
; D" D8 e& ?0 ^tives. There were no siblings.
/ I+ Z9 q' K6 ZPhysical Examination" L2 h2 k& I' y1 p. h. o8 `9 J
The physical examination revealed a very active,* N: X$ A; g# }3 P$ I
playful, and healthy boy. The vital signs documented
6 @% v: \: Y7 Fa blood pressure of 85/50 mm Hg, his length was) K3 f6 {* R- h& w+ l
90 cm (>97th percentile), and his weight was 14.4 kg4 L+ f9 N" c6 \# R. v5 M
(also >97th percentile). The observed yearly growth
" A" X6 X2 T/ b5 U7 d6 {$ X2 j% Dvelocity was 30 cm (12 inches). The examination of
6 y6 s! m/ r, Z- X( s- ~3 ]: c7 Uthe neck revealed no thyroid enlargement.3 }1 K0 C3 [5 G( D3 T
The genitourinary examination was remarkable for
6 y/ w, F0 G0 d- d0 r& `& |enlargement of the penis, with a stretched length of1 t. P! p6 e [/ K. K7 M* h, g
8 cm and a width of 2 cm. The glans penis was very well
2 p! `: p$ `+ b' F/ r- Pdeveloped. The pubic hair was Tanner II, mostly around
' a+ z) m" L/ a: ^3 s540
5 J, C, q* }+ oat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
2 n0 P/ W( M2 O M E: Ithe base of the phallus and was dark and curled. The2 b& q: P9 I- |
testicular volume was prepubertal at 2 mL each.7 l" o C; ?, b0 w% [9 c) v
The skin was moist and smooth and somewhat
( k: j5 m' E& f0 g; d5 s' @8 [oily. No axillary hair was noted. There were no
+ B L2 X/ z! t. P' k2 jabnormal skin pigmentations or café-au-lait spots.
' [ ? Q2 q. G/ X- f; K/ ?Neurologic evaluation showed deep tendon reflex 2+" O# x Z# q5 a0 L, b
bilateral and symmetrical. There was no suggestion- S. A3 f1 l* X# g
of papilledema.3 D" D! F% T" e! J
Laboratory Evaluation: H. p7 w+ ?2 h: _. H
The bone age was consistent with 28 months by3 n) T5 L9 R: y1 t; \- Y4 n; a
using the standard of Greulich and Pyle at a chrono-( [' w3 |: z9 ^/ t
logic age of 16 months (advanced).5 Chromosomal
( ?! `8 F: [" h) K+ N) {# Z9 [5 zkaryotype was 46XY. The thyroid function test0 g) \/ ]: U5 ?6 p3 ]# q `0 H: o
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
) S& ]! G! o2 H, ?7 c2 Vlating hormone level was 1.3 µIU/mL (both normal).
; Y2 e. f% s% A' O9 SThe concentrations of serum electrolytes, blood1 c8 W" T( ^! R; a7 c5 u
urea nitrogen, creatinine, and calcium all were6 |/ z: o5 ?# ^9 o
within normal range for his age. The concentration
9 n, A& }5 p7 i4 g5 Nof serum 17-hydroxyprogesterone was 16 ng/dL' l9 R% [/ z1 M- t2 X# [" G
(normal, 3 to 90 ng/dL), androstenedione was 20, F: q2 `6 H! N; Z. H: A% _
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
& n8 K" X$ P( x7 ~7 i6 ~4 fterone was 38 ng/dL (normal, 50 to 760 ng/dL),
+ Y& z+ j( A. xdesoxycorticosterone was 4.3 ng/dL (normal, 7 to% c/ P+ {8 U& m4 N9 i: j
49ng/dL), 11-desoxycortisol (specific compound S)
! O. o" E; J5 J" i4 ?was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
- C B8 w) K' a% v U! R* R+ C( vtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
" g& e( p0 U( _testosterone was 60 ng/dL (normal <3 to 10 ng/dL),! e b$ v0 v7 K2 V, s/ E% v+ [3 k1 I
and β-human chorionic gonadotropin was less than
9 k2 h1 m$ E# L& g; K) N5 mIU/mL (normal <5 mIU/mL). Serum follicular
2 i$ G. N4 q) F8 a# gstimulating hormone and leuteinizing hormone
: S. Q" e. F0 g" D% a5 n0 d1 bconcentrations were less than 0.05 mIU/mL
3 M8 q E- [/ {7 r* T(prepubertal).+ H" i$ O$ A) X0 a s' j
The parents were notified about the laboratory' M* x& s3 K& a! E. i
results and were informed that all of the tests were. f H/ O3 f) a* ~6 V6 s
normal except the testosterone level was high. The
$ t; [; y4 n- r+ nfollow-up visit was arranged within a few weeks to
( ~$ F8 U4 f9 i$ hobtain testicular and abdominal sonograms; how-
/ H7 M) Y( f, C' ?& c8 gever, the family did not return for 4 months.1 e. u x; c2 l! H) q
Physical examination at this time revealed that the2 w! ^) W5 r9 v* b3 M' g# }% W$ n
child had grown 2.5 cm in 4 months and had gained
/ ] F8 @5 O* O# E3 m2 kg of weight. Physical examination remained m& H3 N! |4 j" y1 V7 ?
unchanged. Surprisingly, the pubic hair almost com-4 q( ]6 f( B. L
pletely disappeared except for a few vellous hairs at
& u2 T; u* A0 l o. i2 Qthe base of the phallus. Testicular volume was still 2
2 ~8 I/ _# }, \" z) E9 h6 [. |mL, and the size of the penis remained unchanged. Z& m7 H2 W- J. @
The mother also said that the boy was no longer hav-
3 A' F; s0 K$ z% w& r* F# Z$ Zing frequent erections.
) S: ]6 h# J3 h; G! t' }% IBoth parents were again questioned about use of
) ?( v0 [, ^& c' ^8 T1 g3 `! @any ointment/creams that they may have applied to% S$ |$ i6 g4 O0 A1 [) J$ E4 u
the child’s skin. This time the father admitted the q% S2 H/ Y" }2 E: I- o
Topical Testosterone Exposure / Bhowmick et al 541
6 I x2 F7 H. ?use of testosterone gel twice daily that he was apply-
+ v$ d8 I: Z$ n: U2 [ing over his own shoulders, chest, and back area for" o7 K% W. j' z- h% `( n
a year. The father also revealed he was embarrassed
% A' ~3 `! Q$ I- e0 g/ B) H0 H7 Vto disclose that he was using a testosterone gel pre-
3 f3 b. g% e6 ^7 y3 cscribed by his family physician for decreased libido
- a8 [( k) @3 A9 I* Gsecondary to depression.
7 o. K4 s- T1 q V2 E S) sThe child slept in the same bed with parents.* X" x+ F4 v1 e1 m n9 w
The father would hug the baby and hold him on his
: v( B. M9 P' ~chest for a considerable period of time, causing sig-& I8 ^9 h5 e& ?0 V7 n; O' B3 }: z' v
nificant bare skin contact between baby and father.: o+ j: V2 c5 L. r9 X* F
The father also admitted that after the phone call,
, u' b0 \8 p; F# x9 n: Dwhen he learned the testosterone level in the baby. [2 a! W9 a L/ {& k
was high, he then read the product information
1 g* k }% _1 R1 L! V" b, npacket and concluded that it was most likely the rea-
; n' m+ P1 D1 Z0 B3 x8 u: ason for the child’s virilization. At that time, they
& o6 E' v9 _ n! @! H0 Kdecided to put the baby in a separate bed, and the
% P9 H7 a6 N5 l. F w" hfather was not hugging him with bare skin and had
* V/ I- |/ D8 Kbeen using protective clothing. A repeat testosterone: d8 k: N! X0 m# T
test was ordered, but the family did not go to the
* w7 O: T' ]: Wlaboratory to obtain the test.6 w8 R n1 F8 o( h
Discussion( C w f9 `/ k% Y
Precocious puberty in boys is defined as secondary
7 g& x+ l2 b$ b, M+ q5 n- v- W- Zsexual development before 9 years of age.1,46 x: ~ y" n# D6 s
Precocious puberty is termed as central (true) when
" C6 q" H. h4 ^( jit is caused by the premature activation of hypo-4 s& v, v0 @3 x: F
thalamic pituitary gonadal axis. CPP is more com-9 D" K* b+ H1 _- M
mon in girls than in boys.1,3 Most boys with CPP
1 k8 O, j( G0 i# P% {may have a central nervous system lesion that is% J2 i% ^5 Y! d
responsible for the early activation of the hypothal-/ e3 e2 n, u7 ~+ c8 h
amic pituitary gonadal axis.1-3 Thus, greater empha-5 K z/ Y: K; W, x3 |( c
sis has been given to neuroradiologic imaging in
9 G. E* Q/ I! t$ @" N3 @) Y% Iboys with precocious puberty. In addition to viril-: l* {$ o& R0 g/ x7 k
ization, the clinical hallmark of CPP is the symmet-; {3 ?2 [% f" @* F- L
rical testicular growth secondary to stimulation by+ z1 p& e. W: F
gonadotropins.1,38 b N5 f! L* {: v
Gonadotropin-independent peripheral preco-- y M0 ~0 N$ G; ?) ~3 T o" ^
cious puberty in boys also results from inappropriate
# j8 c) ?& T9 o1 i( f6 Landrogenic stimulation from either endogenous or" Z) {1 K1 W7 s& \5 R) n! e. ^7 i& z
exogenous sources, nonpituitary gonadotropin stim-
+ e( N" ^# z0 _ulation, and rare activating mutations.3 Virilizing7 G9 T% ], N& E$ l5 L/ y; ]
congenital adrenal hyperplasia producing excessive
6 L, c+ z+ g/ Hadrenal androgens is a common cause of precocious% m5 u, t8 W, e& M& `
puberty in boys.3,4
) A! y& G) Y2 bThe most common form of congenital adrenal6 S4 F9 w9 B, I8 `5 Y
hyperplasia is the 21-hydroxylase enzyme deficiency.+ j1 h% S7 [3 E
The 11-β hydroxylase deficiency may also result in
1 f7 b6 B0 R; j" N$ ?excessive adrenal androgen production, and rarely,, ^, U1 i" J0 a' k2 I4 r' A
an adrenal tumor may also cause adrenal androgen) Q; K ]3 d( c8 X
excess.1,3
) t% x% @# E8 ~& g, t P) \at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
3 O8 Q9 R6 R. e w: y% L7 y542 Clinical Pediatrics / Vol. 46, No. 6, July 20073 V3 b0 T$ e9 Q2 }5 k$ @
A unique entity of male-limited gonadotropin-
8 M7 w+ @) J# vindependent precocious puberty, which is also known7 E0 _9 b2 |, X. s$ N6 T
as testotoxicosis, may cause precocious puberty at a9 d- [& W% r1 R b" U4 `8 j
very young age. The physical findings in these boys8 p' E }* }0 E5 C1 F1 C( k, }8 ~
with this disorder are full pubertal development,
4 G2 _ i; D6 X5 `+ a0 N* Zincluding bilateral testicular growth, similar to boys" r0 a: J) ?3 l- d9 I% V9 Y5 M
with CPP. The gonadotropin levels in this disorder3 m p- {! C) r0 n
are suppressed to prepubertal levels and do not show
/ v# q$ R# Z2 upubertal response of gonadotropin after gonadotropin-
4 R: d% i, ]1 t+ G. h; ?releasing hormone stimulation. This is a sex-linked8 W# {6 J+ [/ \+ I: m- _6 Y. K
autosomal dominant disorder that affects only2 }5 a+ H9 h2 o3 u b
males; therefore, other male members of the family
- M: N& I* g% ?& G8 G) c4 ~9 m9 n$ Imay have similar precocious puberty.3' |* j' h; @ D5 E r, E( L+ y
In our patient, physical examination was incon-
/ K. U4 L* W" f& jsistent with true precocious puberty since his testi-
/ P' Z9 X7 o4 j$ dcles were prepubertal in size. However, testotoxicosis( a9 Q; U: Z7 k
was in the differential diagnosis because his father
% ?1 [: o& o8 {( |* E3 i" {started puberty somewhat early, and occasionally,# s7 v) y2 R4 K! p7 u& {" b8 z
testicular enlargement is not that evident in the& b# p4 @- t/ q$ p
beginning of this process.1 In the absence of a neg-
* H' C( _' ~ b! S# X" L/ \ative initial history of androgen exposure, our
/ K# t% R# p6 z, n5 V5 O( A. fbiggest concern was virilizing adrenal hyperplasia,9 t. g8 m, I) C3 l5 ^. ~
either 21-hydroxylase deficiency or 11-β hydroxylase
0 m5 |- Z, M' R: K# qdeficiency. Those diagnoses were excluded by find-2 a# o6 d* U( H/ r
ing the normal level of adrenal steroids.
7 E$ H% P/ U# y' u8 kThe diagnosis of exogenous androgens was strongly
5 u) B, b' w1 j3 E+ d9 bsuspected in a follow-up visit after 4 months because* D! j, ~, [' P9 t) R
the physical examination revealed the complete disap-% u8 o9 V/ _( Y
pearance of pubic hair, normal growth velocity, and
) V9 ~; a& s) Zdecreased erections. The father admitted using a testos-
4 o& R1 c7 y3 i mterone gel, which he concealed at first visit. He was/ O1 W# Q$ X0 Q
using it rather frequently, twice a day. The Physicians’, A$ y7 k3 O: G% E# A2 n: h, ?
Desk Reference, or package insert of this product, gel or
6 p) a. }" C+ O/ Ucream, cautions about dermal testosterone transfer to8 K- S1 U6 R6 [, Z6 j1 f$ V% O
unprotected females through direct skin exposure." {7 X! y, m8 U' v1 I
Serum testosterone level was found to be 2 times the
( i( }) ]) T/ N: D3 z2 V8 Lbaseline value in those females who were exposed to
: r# Q% t' K* B, y! U6 T) deven 15 minutes of direct skin contact with their male# D% s0 [' s3 Y9 G* ]" N0 Z
partners.6 However, when a shirt covered the applica-
: L" [- F) j3 Y. ?* O2 ^1 \4 Rtion site, this testosterone transfer was prevented.0 R0 P* E* q# W5 R. n
Our patient’s testosterone level was 60 ng/mL,
" V1 i Q: V3 r4 ~( ?which was clearly high. Some studies suggest that/ h7 i$ @! H. i
dermal conversion of testosterone to dihydrotestos-
( z8 G; P3 l. I' ~1 Q- jterone, which is a more potent metabolite, is more
3 N& t n* p( c* Z% jactive in young children exposed to testosterone
+ L) Q* [$ A) `2 }; t1 pexogenously7; however, we did not measure a dihy-
9 ^" _) W/ h+ d$ w$ Fdrotestosterone level in our patient. In addition to
4 z: i6 P' \/ I5 Z0 _virilization, exposure to exogenous testosterone in9 ?, B% n9 v9 L3 q5 l
children results in an increase in growth velocity and
4 W: i5 m( E( m) {* k9 Q+ a" Badvanced bone age, as seen in our patient./ N; u# N& s& n- g
The long-term effect of androgen exposure during
" A( P* a6 f1 I f8 X) ~# P2 [early childhood on pubertal development and final
+ C% c9 X" x% B, H3 wadult height are not fully known and always remain# W& D$ K0 ]1 A- H8 u
a concern. Children treated with short-term testos-% k% O& e5 G! @2 V/ ]: i
terone injection or topical androgen may exhibit some" v+ j7 N' ]: m1 i
acceleration of the skeletal maturation; however, after
$ V: f2 y! M1 {! z* bcessation of treatment, the rate of bone maturation0 y% K' j) n( S: E. R
decelerates and gradually returns to normal.8,9
+ u6 W3 C# x7 f3 K6 c0 m }There are conflicting reports and controversy0 _ D1 [( B6 w( S% ?
over the effect of early androgen exposure on adult
: j- n1 i1 w$ ~1 D" Tpenile length.10,11 Some reports suggest subnormal
' K" m0 S, F" F1 K9 [5 q" h- Fadult penile length, apparently because of downreg-
# `# a& b, V! d, Oulation of androgen receptor number.10,12 However,
, x/ }7 y7 i) ESutherland et al13 did not find a correlation between# W+ {" S% `3 ]! H
childhood testosterone exposure and reduced adult
- e2 h. S3 O" \$ n) f6 o8 @penile length in clinical studies.
% ~ U! Z5 E% Q+ C" rNonetheless, we do not believe our patient is
% [9 y$ `2 I: t2 W* A1 \3 cgoing to experience any of the untoward effects from( b; b1 w; z1 d( \2 }
testosterone exposure as mentioned earlier because
, j5 d, {' M7 r N# V3 cthe exposure was not for a prolonged period of time.9 P0 P( m: }* }) ]1 Q
Although the bone age was advanced at the time of: t0 Q* Y! ^1 \4 Y" s7 R
diagnosis, the child had a normal growth velocity at
& {7 s$ b+ j& ?2 E L" s8 Dthe follow-up visit. It is hoped that his final adult' g" R o& W4 M9 p7 ?* q% `( u
height will not be affected.
! m+ T# t! _" E: T3 x% vAlthough rarely reported, the widespread avail-
! P. ] y7 D' Vability of androgen products in our society may5 ~' j; z/ \; H; I
indeed cause more virilization in male or female
* w& Z% y) c; Qchildren than one would realize. Exposure to andro-
9 J Y/ K9 e% ^9 @' Fgen products must be considered and specific ques-
2 W" B0 {5 l$ C% l% [$ I4 _5 [tioning about the use of a testosterone product or
; }5 d* I* s% Y; u( X5 t- }5 J) J. jgel should be asked of the family members during4 k* B2 {6 m% H1 B) m/ j
the evaluation of any children who present with vir-$ C' f. @0 V/ [/ {" j
ilization or peripheral precocious puberty. The diag-' K" f$ O2 `4 }- F5 @
nosis can be established by just a few tests and by
6 F, D; |/ t% j6 W$ X$ ~* dappropriate history. The inability to obtain such a! g. r1 @3 u% C
history, or failure to ask the specific questions, may, Z5 D7 M' } C; t
result in extensive, unnecessary, and expensive
- R! R4 y0 \( J r+ X1 n+ C" @investigation. The primary care physician should be
, @- Y" N% J9 `aware of this fact, because most of these children
1 v' U& y8 A9 m V) p" R+ h; Y# Rmay initially present in their practice. The Physicians’3 U- \2 H7 \7 n: q
Desk Reference and package insert should also put a
: E% k6 `! _1 ?2 a% Q6 ?warning about the virilizing effect on a male or
R1 M$ _" [" g6 m1 zfemale child who might come in contact with some-" ?7 g+ ?, z( [; d
one using any of these products.
8 V8 i/ O& s# l( _& R1 ~References
( a4 ]% l. T1 Q4 T6 x. l7 N1. Styne DM. The testes: disorder of sexual differentiation
6 z* u* O8 u6 }( W6 T) K1 Hand puberty in the male. In: Sperling MA, ed. Pediatric5 t; P7 y3 Q% s
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
' [: V+ G2 F! W2002: 565-628.3 O5 G3 r# B f- t7 }+ A& Z6 U2 q
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious1 l' h- _4 b0 A1 R+ g0 f
puberty in children with tumours of the suprasellar pineal
5 |8 p3 |& f9 a% {- R& ]1 D. Pat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' I/ O0 |, t; X: S& s/ K6 \2 a, j: h
Topical Testosterone Exposure / Bhowmick et al 543
, \, T* \# p' n* w5 Bareas: organic central precocious puberty. Acta Paediatr.* o5 s4 Q# p+ m; \ G
2001;90:751-756.: q3 J* j6 z& C" B1 [
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.6 W& @1 |3 e4 t r4 O; f
Pediatric Endocrinology. 4th ed. New York, NY: Marcel& |5 O/ f# @: P/ V2 k
Dekker Inc; 2003:211-238.' O+ B; V6 a" Z
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual0 H4 ~# m9 P1 l8 y6 K) I, ?
development in a two-year-old boy induced by topical
% u! U0 }8 [6 T3 Q! e, eexposure to testosterone. Pediatrics. 1999;104:e23.
2 n* y- f, } x) I, y3 I5. Greulich WW, Pyle SI, eds. Radiographic Atlas of7 F+ {6 x. n3 s( B! ]9 N9 P
Skeletal Development of the Hand and Wrist. 2nd ed.
7 B; c$ z5 m, S O" WStanford, CA: Stanford University Press; 1959.
. C; f; A6 a* m4 f6. Physicians’ Desk Reference. Androgel 1% testosterone,+ c0 v- X1 `" M3 A5 g" G
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
- F; |( j; M5 ~2 H8 Z2 c9 KEconomics Company, Inc; 2004:3239-3241.. a( x/ g$ L0 F. ]* C
7. Klugo RC, Cerny JC. Response of micropenis to topical2 r0 ]: T) q5 n# o) I: {" B0 _' d
testosterone and gonadotropin. J Urol. 1978;119:# _; p4 N3 X/ S, f3 J
667-668.
, y: ], S9 ?7 j8. Guthrie RD, Smith DW, Graham CB. Testosterone8 n; H1 d1 v7 m" n5 Z* D: i+ b! s
treatment for micropenis during early childhood. J Pediatr.
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